PreSonus ADL 600
Two-Channel High-Voltage Tube Preamp

The PreSonus ADL 600 is a high voltage two-channel microphone preamplifier. The ADL 600 utilizes a unique high voltage, Class A discrete design with three vacuum tubes per channel for maximum headroom and tonality. Hand built in the USA, the ADL 600 utilizes the finest components in the world including switched attenuator's, military grade vacuum tubes, analog VU and LED meters, custom-designed transformers, and the list goes on.

Control and Flexibility
The input selector allows for selection between Hi-Z instrument input, line input and four different microphone impedances for a wide variety of sounds and applications. The High Pass Filter is a rotary switch with three filter settings (40Hz, 80Hz, and 120Hz @ 6dB per octave) for passively and unobtrusively controlling room rumble and low frequency noise. The input gain attenuator is a military-grade rotary switch delivering 5dB step increments and a total preamplifier gain of 70dB. The output trim is a high quality variable conductive plastic attenuator delivering +/-10dB of fine tune trim adjustment to "dial-in" the perfect gain structure for the application at hand. The ADL 600 also includes 48V phantom power and a -20dB pad both controlled by big sturdy military grade switches.

Under the Hood
The ADL 600 is a fully discrete transformer input/output Class A design incorporating three military-grade vacuum tubes per channel operating at voltages of +/-300V power rails for maximum tube tonality and headroom. There are no op-amps or integrated circuits (IC's) in the signal path to ensure the purest sound possible. The dual transformer design also ensures ultra low noise operation with maximum common mode rejection.

Metering
The ADL 600 is packed with both fast-acting eight-segment LED meters for accurately detecting fast transients and peaks, as well as large high quality analog VU meters for metering overall output giving the best of both worlds for all types of recording applications.

Features